WO2013042612A1 - Film sheath battery and assembled battery - Google Patents

Film sheath battery and assembled battery Download PDF

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Publication number
WO2013042612A1
WO2013042612A1 PCT/JP2012/073508 JP2012073508W WO2013042612A1 WO 2013042612 A1 WO2013042612 A1 WO 2013042612A1 JP 2012073508 W JP2012073508 W JP 2012073508W WO 2013042612 A1 WO2013042612 A1 WO 2013042612A1
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WO
WIPO (PCT)
Prior art keywords
battery
film
electrode tab
positive electrode
negative electrode
Prior art date
Application number
PCT/JP2012/073508
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French (fr)
Japanese (ja)
Inventor
真介 榎本
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Ｎｅｃエナジーデバイス株式会社
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Publication of WO2013042612A1 publication Critical patent/WO2013042612A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a film-clad battery in which two film-clad batteries, such as lithium-ion batteries, which are packaged with a film-shaped packaging material, are serially or in parallel.
  • Lithium ion secondary batteries are used in applications that require miniaturization and high capacity, such as power supplies for mobile devices such as mobile phones and digital cameras.
  • a film-clad battery using a film-shaped exterior material as a battery casing can be made lighter than a battery having a metal can body or the like as a casing.
  • the use of an assembled battery in which a large number of unit batteries are combined in series and in parallel is increasing as a power source requiring high voltage and high capacity for electric vehicles and power storage. For this reason, the request
  • FIG. 5 is a diagram illustrating a conventional film-clad battery
  • FIG. 5A is a front view illustrating a unit cell of the film-clad battery
  • FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked.
  • FIG. 5C is a perspective view illustrating a state in which unit cells are connected in series.
  • the unit cell 10 of the film-clad battery shown in FIG. 5A has the positive electrode tab 11 and the negative electrode tab 12 taken out from the heat-sealed portion of the film-shaped outer package 13, and each unit cell 10 has an adhesive or An adhering portion 20 for bonding an adhesive tape or the like is provided.
  • the unit cells 10 are stacked to make electrical connection in series and in parallel, and to prevent displacement between unit cells caused by vibration and impact.
  • the unit cells are fixed and integrated by the fixing portion 20 using an adhesive or a double-sided adhesive tape, and then the positive electrode tab and the negative electrode tab are bonded using the bonding piece 21.
  • the unit cells which is one less than the number of unit cells, in order to prevent the individual unit cells from shifting (see Patent Document 1).
  • the present invention is a secondary battery covered with a film-like exterior material, which is lighter than a battery in which a plurality of unit batteries are stacked and bonded together, and the manufacturing process is simple. It is an object of the present invention to provide a battery in which a plurality of battery elements are integrated and stored, and an assembled battery using the battery.
  • the partition member provided with the film-shaped exterior material which has the battery element accommodating part which accommodates these battery elements, and the non-permeability which does not permeate
  • a film outer battery comprising a positive electrode tab drawn from the battery element, a negative electrode tab, and the outer peripheral portion of the partition member are integrally sealed at a sealing portion with a film-shaped outer material, It is a film-clad battery in which a positive electrode tab and a negative electrode tab taken out from the sealing portion are connected in series or in parallel.
  • the partition member is a film-shaped packaging material.
  • the partition member has a metal plate surface coated with polypropylene or polyphenylene sulfide. It is a battery pack in which a plurality of the film-clad batteries or the film-clad battery and a battery containing a single battery element are connected to form at least one of electrical connections in parallel or in series.
  • the partition member that separates the battery elements also serves as an outer package of each battery element, and is lighter in weight and has a smaller volume than the battery in which the unit batteries are stacked. Can be reduced.
  • a plurality of battery elements are housed in one film-like exterior material, an adhesive and an adhesive tape for fixing the film-like exterior materials that prevent the unit battery from being displaced are unnecessary, and the manufacturing process is simplified.
  • the weight of the assembled battery can be reduced.
  • FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention.
  • FIG. 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line A-A ′ in FIG. 1A.
  • FIG. 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • FIG. 3 is a diagram for explaining another embodiment of the present invention.
  • 3A is a plan view
  • FIG. 3B is a cross-sectional view taken along line B-B ′ in FIG. 3A.
  • FIG. 4 is an exploded perspective view illustrating an embodiment of the film-clad battery shown in FIG.
  • FIG. 5 is a diagram for explaining a conventional film-clad battery.
  • FIG. 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line A-A ′ in FIG. 1A.
  • FIG. 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • FIG. 5A is a front view illustrating a unit battery of a film-clad battery.
  • FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked.
  • FIG. 5C is a perspective view illustrating a state in which unit batteries are directly connected.
  • FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention.
  • 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line AA ′ in FIG. 1A.
  • 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • the lithium ion battery sealed with the film-like exterior material of the present invention has a lithium-manganese composite oxide, a lithium-cobalt composite oxide, and a lithium nickel.
  • the positive electrode absorbs and releases lithium ions on a positive electrode current collector made of an aluminum foil. It can be produced by forming a coating layer of a slurry containing a positive electrode active material such as a composite oxide or olivine type lithium iron phosphate and then cutting it into a predetermined shape through steps such as drying and compression.
  • the negative electrode is formed by forming a coating layer of a slurry containing a negative electrode active material such as carbon material such as graphite, which absorbs and releases lithium ions on a negative electrode current collector made of copper foil, and then performs steps such as drying and compression. Then, it can be manufactured by cutting into a predetermined shape.
  • a battery element is produced by laminating a positive electrode and a negative electrode through a separator made of a polyolefin film or the like, or a laminate of a separator / positive electrode / separator / negative electrode is laminated in a flat shape.
  • a battery element made of a wound body can be produced.
  • a positive electrode tab made of aluminum is attached to the positive electrode current collector as an external connection terminal, and a negative electrode tab made of nickel or nickel-coated copper is attached to the negative electrode current collector by resistance welding or ultrasonic bonding. Used for charging and discharging batteries.
  • the film-clad battery 10 of the present invention has a positive electrode 152 in which a positive electrode active material layer 151 is formed on the surface of the positive electrode current collector 150 in the battery element housing part 14 inside the film-shaped outer package 13.
  • battery elements 15A and 15B in which a negative electrode 156 having a negative electrode active material layer 155 formed on a negative electrode current collector 154 is stacked via a separator 157, and the battery elements 15A and 15B are electrically insulated.
  • an electrically insulating partition member 16 that is impermeable to electrolyte solution that prevents leakage current from being generated by a liquid junction through the electrolyte solution between the battery elements is disposed.
  • each of the battery elements 15 ⁇ / b> A and 15 ⁇ / b> B housed in the battery element housing portion 14 is formed by the film-shaped exterior member 13. Even if it exists in space, each battery element can be made completely independent. Therefore, a film-covered battery containing two battery elements that is not different from a battery sealed with a film-like exterior material individually. Obtainable.
  • the partition member 16 may be made of a synthetic resin material that does not allow electrolyte to pass through, or a material made of a metal material whose surface is covered with a synthetic resin layer.
  • a polyolefin member such as polypropylene, a film-like exterior material used as a battery exterior material, a plate-like body such as polyphenylene sulfide having good chemical resistance, or a metal plate such as an aluminum plate as described above.
  • a member coated with a synthetic resin material can be used. When the member which coat
  • the battery elements 15A and 15B each have the positive electrode tabs 11A and 11B taken out from one side of the outer peripheral portion, and the negative electrode tab 12A taken out from the side opposite to the side from which the positive electrode tab 11A was taken out. Yes. Further, the negative electrode tab 12B is taken out from the side opposite to the side from which the positive electrode tab 11B is taken out.
  • the center lines in the lead-out direction of the positive electrode tab 11A and the negative electrode tab 12B are arranged at an equal distance from the line passing through the center of the side from which the positive electrode tab and the negative electrode tab are taken out.
  • the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B taken out from the film-shaped exterior member 13 forming the battery element housing portion 14 are respectively covered with a sealing material 18, and the positive electrode tab and the negative electrode tab are covered.
  • the sealing property between the film-like exterior material 13 at the portion where the material is taken out is enhanced.
  • one battery element 15B will be mounted
  • an insulating partition member 16 that is impermeable to electrolyte solution is disposed on the battery element 15 ⁇ / b> B, and the other battery element 15 ⁇ / b> A is placed on the partition member 16.
  • the battery element 15A is covered with the upper battery element storage portion 14A formed by embossing on the film-shaped exterior member 13, and the outer periphery of the upper battery element storage portion 14A is replaced with the outer periphery of the lower battery element storage portion 14B, and the partition member.
  • sealing is performed by heat fusion, leaving an electrolyte injection portion (not shown) including a portion where the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B exist.
  • the electrolytic solution injecting portion is sealed and sealed.
  • the insulating partition member 16 in which the electrolytic solution is impermeable is disposed, so that a liquid junction due to the electrolytic solution does not occur between the battery elements.
  • the positive electrode tab 11 ⁇ / b> B and the negative electrode tab 12 ⁇ / b> A taken out from the side opposite to the positive electrode tab 11 ⁇ / b> A and the negative electrode tab 12 ⁇ / b> B serving as charge / discharge terminals are joined together to form the conductive connection portion 17.
  • the positive electrode tab 11B and the negative electrode tab 12A are located at the top and bottom because the negative electrode tab 12A is positioned at the center of the side where the positive electrode tab 11B and the positive electrode tab 11B are projected in the vertical direction. It is possible to easily form mutual conductive connection portions of the positive electrode tab 11B and the negative electrode tab 12A in the conductive connection portion 17.
  • the volumetric efficiency of the battery can be improved by folding the conductive connection portion 17 after covering with an insulating tape or the like.
  • the battery manufactured as described above has the battery element 15A and the battery element 15B connected in series, by using the positive electrode tab 11A and the negative electrode tab 12A as charge / discharge terminals, the battery having one battery element can be obtained.
  • a double series battery having a double voltage can be obtained.
  • the number of adhesion points can be reduced by half compared to the case where individual unit cells are stacked.
  • FIG. 3 is a diagram for explaining another embodiment of the present invention.
  • 3A is a plan view
  • FIG. 3B is a cross-sectional view taken along line BB ′ in FIG. 3A.
  • FIG. 4 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • the film-clad battery 10 of the present invention includes battery elements 15C and 15D in the battery element storage portions 14A and 14B inside the film-shaped packaging material 13, and electrically insulates the battery elements 15C and 15D.
  • a partition member 16 that prevents a leakage current from being generated due to a liquid junction formed between the battery elements by the electrolytic solution is disposed.
  • the battery elements 15C and 15D have the same shape and are mounted upside down.
  • the positive electrode tab 11C and the negative electrode tab 12C, and the positive electrode tab 11D and the negative electrode tab 12D are taken out in parallel from the same side.
  • the positive electrode tabs 11C and 11D and the negative electrode tabs 12C and 12D are attached to target positions on a line passing through the center of the side from which these tabs are taken out.
  • the partition member 16 is placed on the battery element 15D housed in the lower battery element housing portion 14D of the film-shaped exterior material, and the battery element 15C is placed on the partition member 16.
  • the negative electrode tab 12C is located on the upper part of the positive electrode tab 11D and the positive electrode tab 11C is located on the upper part of the negative electrode tab 12D, mutual connection can be facilitated. Further, since the positive electrode tab 11C and the negative electrode tab 12D are close to each other, it is preferable to prevent a short circuit from occurring by using an insulating tape or the like in a portion where the two are opposed to each other.
  • the battery of the present invention can be manufactured as follows.
  • the battery element 15D is mounted in the lower battery element storage portion 14D, and the electrolyte solution-impermeable and insulating partition member 16 is disposed above the battery element 15D.
  • the battery element 15C is disposed on the upper part of the partition member 16, the battery element 15C is covered from the upper part by the upper battery element storage part 14C, and the peripheral part of the battery element storage part and the partition member 16 are overlapped with each other.
  • 11C and 11D, and the portion where the negative electrode tabs 12C and 12D exist are heat-sealed around the battery element storage portion 14 leaving an electrolyte injection portion (not shown) to form a sealing portion.
  • the electrolytic solution injecting portion is sealed and sealed.
  • the negative electrode tab 12C and the positive electrode tab 11D are joined to each other at the conductive connection portion 17 while leaving the positive electrode tab 11C and the negative electrode tab 12D serving as charge / discharge terminals, thereby connecting the two battery elements 15C and 15D.
  • a battery connected in series is obtained.
  • an insulating and non-electrolyte partition member 16 is disposed to connect the battery element 15C and the battery element 15D. There is no leakage current due to the formation of the liquid junction.
  • the battery produced as described above has a positive electrode tab 11C and a negative electrode tab 12D as charge / discharge terminals, a series connection is formed between the battery element 15C and the battery element 15D.
  • a two-series battery having a voltage twice that of the provided battery can be manufactured.
  • the number of bonding points can be reduced by half compared to the case where individual unit cells are stacked. it can.
  • the partition member that separates the two battery elements also serves as an exterior body of the two unit batteries, and therefore, is more insulated than a two-series battery using two general unit batteries.
  • the film-like exterior materials are placed together in order to prevent the unit cells from shifting as in the case where the battery elements are individually covered with the film-like exterior material. Since an adhesive and an adhesive tape to be fixed are unnecessary, the manufacturing process is simplified and the weight can be reduced.
  • the connection is not limited to serial connection, and may be connected in parallel. By connecting in parallel, it is possible to provide a battery having the same voltage as that of a battery having a single battery element and a charge / discharge capacity of twice.
  • the battery element storage unit is not limited to storing two battery elements, and stores three or more battery elements, and a partition member is disposed between the battery elements, and the battery elements are connected in series and in parallel. A battery connected to can be provided.
  • the film-clad battery of the present invention and the assembled battery using the same are lighter than conventional film-clad batteries and can be efficiently provided with fewer processes. It is useful as a power source that requires energy.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

[Problem] To provide a battery and an assembled battery in which a plurality of battery elements are sealed by one film-shaped sheath material and are connected either serially or in parallel. [Solution] A film sheath battery is formed from: a plurality of battery elements whereupon cathode tabs and anode tabs are extruded; a film-shaped sheath material having a battery element housing part which houses the plurality of battery elements; and a compartment material having non-permeability which does not permit electrolyte permeability, and electrical insulation. The cathode tabs and anode tabs which are extruded from the battery elements, and the outer circumference parts of the compartment material, are integrally sealed in aperture parts with the film-shaped sheath material. The cathode tabs and anode tabs which are extruded from the aperture parts are connected either serially or in parallel.

Description

フィルム外装電池および組電池Film outer battery and battery pack
　本発明は、フィルム状外装材で外装したリチウムイオン電池等のフィルム外装電池を２直列化あるいは２並列したフィルム外装電池に関する。 The present invention relates to a film-clad battery in which two film-clad batteries, such as lithium-ion batteries, which are packaged with a film-shaped packaging material, are serially or in parallel.
　携帯電話やデジタルカメラなどの携帯機器等の電源のように小型化、高容量化が求められる用途では、リチウムイオン二次電池が用いられている。また、フィルム状外装材を電池筐体として用いるフィルム外装電池は、金属缶体等を筐体とした電池よりも軽量化できる。近年、電気自動車用、電力貯蔵用といった高電圧、高容量を必要とする電源として、単位電池を多数個直列・並列に組み合わせた組電池を使用する用途が増えてきている。
　このため、高電圧、高エネルギー密度であって軽量なフィルム状外装材を用いたリチウムイオン二次電池に対する要求が高まっている。 Lithium ion secondary batteries are used in applications that require miniaturization and high capacity, such as power supplies for mobile devices such as mobile phones and digital cameras. In addition, a film-clad battery using a film-shaped exterior material as a battery casing can be made lighter than a battery having a metal can body or the like as a casing. In recent years, the use of an assembled battery in which a large number of unit batteries are combined in series and in parallel is increasing as a power source requiring high voltage and high capacity for electric vehicles and power storage.
For this reason, the request | requirement with respect to the lithium ion secondary battery using a high voltage, high energy density, and a lightweight film-like exterior material is increasing.
　図５は、従来のフィルム外装電池を説明する図であり、図５Ａはフィルム外装電池の単位電池を説明する正面図である。図５Ｂは複数のフィルム外装電池の単位電池を積層した組み電池の断面図である。また、図５Ｃは、単位電池を直列接続した状態を説明する斜視図である。
　図５Ａに示すフィルム外装電池の単位電池１０は、フィルム状外装材１３の熱融着部から正極タブ１１、負極タブ１２が取り出されており、各単位電池１０には、外面に接着剤、もしくは粘着テープ等を接合する固着部２０が設けられている。
　組電池を作製する際には、図５Ｂ、図５Ｃに示すように、単位電池１０を積み重ねて、直列、並列に電気接続を行うとともに、振動、衝撃により生じる単位電池間のずれを防止するために接着剤あるいは、両面粘着テープ等を用いて固着部２０によって単位電池間を固定して一体化した後に、正極タブ、負極タブを接合片２１を用いて接合している。
　このように、組電池を作製する工程では、個々の単位電池のずれを防止するために単位電池の個数よりも１枚少ない数の単位電池間の固定が必要となる（特許文献１参照）。 FIG. 5 is a diagram illustrating a conventional film-clad battery, and FIG. 5A is a front view illustrating a unit cell of the film-clad battery. FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked. FIG. 5C is a perspective view illustrating a state in which unit cells are connected in series.
The unit cell 10 of the film-clad battery shown in FIG. 5A has the positive electrode tab 11 and the negative electrode tab 12 taken out from the heat-sealed portion of the film-shaped outer package 13, and each unit cell 10 has an adhesive or An adhering portion 20 for bonding an adhesive tape or the like is provided.
When producing an assembled battery, as shown in FIGS. 5B and 5C, the unit cells 10 are stacked to make electrical connection in series and in parallel, and to prevent displacement between unit cells caused by vibration and impact. The unit cells are fixed and integrated by the fixing portion 20 using an adhesive or a double-sided adhesive tape, and then the positive electrode tab and the negative electrode tab are bonded using the bonding piece 21.
As described above, in the process of manufacturing the assembled battery, it is necessary to fix the unit cells, which is one less than the number of unit cells, in order to prevent the individual unit cells from shifting (see Patent Document 1).
特開２００６－１７２９９４号公報JP 2006-172994 A
　複数個のフィルム外装電池を積層した組電池においては、各単位電池のずれを防止するために各単位電池間に接着剤を塗布したり、粘着テープを接着して固定する方法は、電池の機能には不必要な部材を使用するとともに、容積効率に優れたフィルム状外装電池の特性を低下させ、製作工程が複雑なものとなるという問題があった。
　本発明は、フィルム状外装材で外装した２次電池であって、単位電池の複数個を積層して、相互に接着した後に直列接続した電池に比べて軽量であるとともに、製作工程も簡単である複数の電池要素を一体化して収納した電池、およびそれを用いた組電池を提供することを課題とするものである。 In an assembled battery in which a plurality of film-clad batteries are stacked, in order to prevent displacement of each unit battery, a method of applying an adhesive between each unit battery or bonding and fixing an adhesive tape is a function of the battery. In addition to using unnecessary members, there is a problem that the characteristics of the film-shaped exterior battery excellent in volumetric efficiency are lowered, and the manufacturing process becomes complicated.
The present invention is a secondary battery covered with a film-like exterior material, which is lighter than a battery in which a plurality of unit batteries are stacked and bonded together, and the manufacturing process is simple. It is an object of the present invention to provide a battery in which a plurality of battery elements are integrated and stored, and an assembled battery using the battery.
　本発明は、上記課題を解決するものであって、前記複数の電池要素を収納する電池要素収納部を有するフィルム状外装材と、電解液を透過させない非透過性と電気絶縁性を備える区画部材からなるフィルム外装電池であって、前記電池要素から引き出された正極タブ、負極タブ、および前記区画部材の外周部は、フィルム状外装材との封口部において一体に封口されたものであって、前記封口部から取り出された正極タブ、負極タブを、直列または並列に接続したフィルム外装電池である。
　前記区画部材がフィルム状外装材である前記のフィルム外装電池である。
　前記区画部材が金属板の表面をポリプロピレンまたはポリフェニレンスルフィドで被覆したものである前記のフィルム外装電池である。
　前記フィルム外装電池の複数個同士、あるいは前記フィルム外装電池と単一の電池要素を収納した電池とを、並列、直列の少なくともいずれか一方の電気的接続を形成して接続した組電池である。 This invention solves the said subject, Comprising: The partition member provided with the film-shaped exterior material which has the battery element accommodating part which accommodates these battery elements, and the non-permeability which does not permeate | transmit electrolyte solution, and electrical insulation A film outer battery comprising a positive electrode tab drawn from the battery element, a negative electrode tab, and the outer peripheral portion of the partition member are integrally sealed at a sealing portion with a film-shaped outer material, It is a film-clad battery in which a positive electrode tab and a negative electrode tab taken out from the sealing portion are connected in series or in parallel.
In the film-clad battery, the partition member is a film-shaped packaging material.
In the film-clad battery, the partition member has a metal plate surface coated with polypropylene or polyphenylene sulfide.
It is a battery pack in which a plurality of the film-clad batteries or the film-clad battery and a battery containing a single battery element are connected to form at least one of electrical connections in parallel or in series.
　本発明によれば、電池要素を隔てる区画部材は、各電池要素の外装体を兼ねており、単位電池を積層した電池に比べて、絶縁層１枚分が不要であるので軽量にするとともに容積を減少させることが可能である。
　また、複数の電池要素を一つのフィルム状外装材に収納したので、単位電池のずれを防止するフィルム状外装材同士を固定する接着剤、粘着テープが不要であるので、製造工程が簡単になると共に組電池の軽量化が可能となる。 According to the present invention, the partition member that separates the battery elements also serves as an outer package of each battery element, and is lighter in weight and has a smaller volume than the battery in which the unit batteries are stacked. Can be reduced.
In addition, since a plurality of battery elements are housed in one film-like exterior material, an adhesive and an adhesive tape for fixing the film-like exterior materials that prevent the unit battery from being displaced are unnecessary, and the manufacturing process is simplified. In addition, the weight of the assembled battery can be reduced.
図１は、本発明のフィルム外装電池の一実施例を説明する図である。　図１Ａは、平面図であり、図１Ｂは、図１ＡにおいてＡ－Ａ’線で切断した断面図を示す。FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention. FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along line A-A ′ in FIG. 1A. 図２は、図１で示すフィルム外装電池の一実施例を説明する分解斜視図である。FIG. 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG. 図３は、本発明の他の実施態様を説明する図である。　図３Ａは、平面図であり、図３Ｂは、図３ＡにおいてＢ－Ｂ’線で切断した断面図を示す。FIG. 3 is a diagram for explaining another embodiment of the present invention. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along line B-B ′ in FIG. 3A. 図４は、図３で示すフィルム外装電池の実施態様を説明する分解斜視図である。FIG. 4 is an exploded perspective view illustrating an embodiment of the film-clad battery shown in FIG. 図５は、従来のフィルム外装電池を説明する図である。　図５Ａはフィルム外装電池の単位電池を説明する正面図である。図５Ｂは複数のフィルム外装電池の単位電池を積層した組み電池の断面図である。図５Ｃは、単位電池を直接接続した状態を説明する斜視図である。FIG. 5 is a diagram for explaining a conventional film-clad battery. FIG. 5A is a front view illustrating a unit battery of a film-clad battery. FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked. FIG. 5C is a perspective view illustrating a state in which unit batteries are directly connected.
　本発明のフィルム外装電池およびそれを用いた組電池は、各種の電池に適用することが可能であるが、以下の説明では、リチウムイオン二次電池を例に挙げて説明する。
　図１は、本発明のフィルム外装電池の一実施例を説明する図である。
　図１Ａは、平面図であり、図１Ｂは、図１ＡにおいてＡ－Ａ’線で切断した断面図を示す。
　また、図２は、図１で示すフィルム外装電池の一実施例を説明する分解斜視図である。
　本発明のフィルム状外装材で封口したリチウムイオン電池は、正極電極はアルミニウム箔からなる正極集電体上にリチウムイオンを吸蔵、放出する、リチウムマンガン複合酸化物、リチウムコバルト複合酸化物、リチウムニッケル複合酸化物、オリビン型リン酸鉄リチウム等の正極活物質を含むスラリーの塗布層を形成した後に乾燥、圧縮等の工程を経て所定の形状に切断することによって製造することができる。
　一方、負極電極は、銅箔からなる負極集電体上にリチウムイオンを吸蔵、放出する黒鉛等の炭素材料等の負極活物質を含むスラリーの塗布層を形成した後に乾燥、圧縮等の工程を経て所定の形状に切断することによって製造することができる。 The film-clad battery and the assembled battery using the same according to the present invention can be applied to various types of batteries. In the following description, a lithium ion secondary battery will be described as an example.
FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention.
1A is a plan view, and FIG. 1B is a cross-sectional view taken along line AA ′ in FIG. 1A.
2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
The lithium ion battery sealed with the film-like exterior material of the present invention has a lithium-manganese composite oxide, a lithium-cobalt composite oxide, and a lithium nickel. The positive electrode absorbs and releases lithium ions on a positive electrode current collector made of an aluminum foil. It can be produced by forming a coating layer of a slurry containing a positive electrode active material such as a composite oxide or olivine type lithium iron phosphate and then cutting it into a predetermined shape through steps such as drying and compression.
On the other hand, the negative electrode is formed by forming a coating layer of a slurry containing a negative electrode active material such as carbon material such as graphite, which absorbs and releases lithium ions on a negative electrode current collector made of copper foil, and then performs steps such as drying and compression. Then, it can be manufactured by cutting into a predetermined shape.
　正極電極と負極電極とを、ポリオレフィンフィルム等からなるセパレーターを介して積層して電池要素を作製するか、あるいは、セパレーター／正極電極／セパレーター／負極電極の順に積層したものを扁平状に巻回した巻回体からなる電池要素、を作製することができる。
　また、電池要素には、外部接続端子として正極集電体にはアルミニウムからなる正極タブ、負極集電体にはニッケルあるいはニッケル被覆銅からなる負極タブを、抵抗溶接あるいは超音波接合等により取り付けて電池の充放電に利用する。 A battery element is produced by laminating a positive electrode and a negative electrode through a separator made of a polyolefin film or the like, or a laminate of a separator / positive electrode / separator / negative electrode is laminated in a flat shape. A battery element made of a wound body can be produced.
In addition, a positive electrode tab made of aluminum is attached to the positive electrode current collector as an external connection terminal, and a negative electrode tab made of nickel or nickel-coated copper is attached to the negative electrode current collector by resistance welding or ultrasonic bonding. Used for charging and discharging batteries.
　図１に示すように、本発明のフィルム外装電池１０は、フィルム状外装材１３の内部の電池要素収納部１４に、正極集電体１５０面上に正極活物質層１５１を形成した正極電極１５２と、負極集電体１５４上に負極活物質層１５５を形成した負極電極１５６をセパレータ１５７を介して積層した電池要素１５Ａ、１５Ｂを備えており、各電池要素１５Ａ，１５Ｂを電気的に絶縁するとともに、各電池要素の間で電解液を通じた液絡部によって漏洩電流が生じることを防止する電解液が非透過性の電気絶縁性の区画部材１６が配置されている。
　区画部材１６は、その周囲がフィルム状外装材１３との熱融着によって接合されているので、電池要素収納部１４に収納した各電池要素１５Ａ、１５Ｂは、フィルム状外装材１３で形成した内部空間に存在しても、それぞれの電池要素は完全に独立したものとすることができるので個別にフィルム状外装材によって封口した電池とは変わりがない２個の電池要素を収容したフィルム外装電池を得ることができる。 As shown in FIG. 1, the film-clad battery 10 of the present invention has a positive electrode 152 in which a positive electrode active material layer 151 is formed on the surface of the positive electrode current collector 150 in the battery element housing part 14 inside the film-shaped outer package 13. And battery elements 15A and 15B in which a negative electrode 156 having a negative electrode active material layer 155 formed on a negative electrode current collector 154 is stacked via a separator 157, and the battery elements 15A and 15B are electrically insulated. In addition, an electrically insulating partition member 16 that is impermeable to electrolyte solution that prevents leakage current from being generated by a liquid junction through the electrolyte solution between the battery elements is disposed.
Since the periphery of the partition member 16 is bonded by thermal fusion with the film-shaped exterior member 13, each of the battery elements 15 </ b> A and 15 </ b> B housed in the battery element housing portion 14 is formed by the film-shaped exterior member 13. Even if it exists in space, each battery element can be made completely independent. Therefore, a film-covered battery containing two battery elements that is not different from a battery sealed with a film-like exterior material individually. Obtainable.
　区画部材１６には、電解液が透過しない合成樹脂製材料、金属材料の表面を合成樹脂層で被覆した材料等で作製したものを用いることができる。具体的には、ポリプロピレン等のポリオレフィン製部材、電池の外装材として用いるフィルム状外装材、あるいは耐薬品性が良好なポリフェニレンスルフィド等の板状体、あるいはアルミニウム板等の金属板を上記のような合成樹脂材料で被覆した部材等を用いることができる。区画部材として金属板を合成樹脂で被覆した部材を使用した場合には、各電池要素の温度を均一にするという効果も得られる。 The partition member 16 may be made of a synthetic resin material that does not allow electrolyte to pass through, or a material made of a metal material whose surface is covered with a synthetic resin layer. Specifically, a polyolefin member such as polypropylene, a film-like exterior material used as a battery exterior material, a plate-like body such as polyphenylene sulfide having good chemical resistance, or a metal plate such as an aluminum plate as described above. A member coated with a synthetic resin material can be used. When the member which coat | covered the metal plate with the synthetic resin is used as a partition member, the effect that the temperature of each battery element is made uniform is also acquired.
　電池要素１５Ａ、１５Ｂは、それぞれ一方の外周部の辺から正極タブ１１Ａ、１１Ｂが取り出されており、正極タブ１１Ａが取り出された辺とは反対側の辺からは、負極タブ１２Ａが取り出されている。また、正極タブ１１Ｂが取り出された辺とは反対側の辺からは負極タブ１２Ｂが取り出されている。
　正極タブ１１Ａ、負極タブ１２Ｂは、それぞれの引出方向の中心線は、前記正極タブ、前記負極タブを取り出す辺の中心をとおる線から等しい距離に配置されている。また、電池要素収納部１４を形成するフィルム状外装材１３から、外部に取り出される正極タブ１１Ａ、１１Ｂ、負極タブ１２Ａ、１２Ｂには、それぞれシール材１８が被覆されており、正極タブ、負極タブを外部に取り出す部分でのフィルム状外装材１３との間の密封性を高めている。 The battery elements 15A and 15B each have the positive electrode tabs 11A and 11B taken out from one side of the outer peripheral portion, and the negative electrode tab 12A taken out from the side opposite to the side from which the positive electrode tab 11A was taken out. Yes. Further, the negative electrode tab 12B is taken out from the side opposite to the side from which the positive electrode tab 11B is taken out.
The center lines in the lead-out direction of the positive electrode tab 11A and the negative electrode tab 12B are arranged at an equal distance from the line passing through the center of the side from which the positive electrode tab and the negative electrode tab are taken out. Further, the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B taken out from the film-shaped exterior member 13 forming the battery element housing portion 14 are respectively covered with a sealing material 18, and the positive electrode tab and the negative electrode tab are covered. The sealing property between the film-like exterior material 13 at the portion where the material is taken out is enhanced.
　本発明の電池の製造方法を順に説明すると、フィルム状外装材１３をエンボス加工することで形成した下部電池要素収納部１４Ｂに一方の電池要素１５Ｂを装着する。次いで、電池要素１５Ｂ上に、電解液非透過性である絶縁性の区画部材１６を配置し、前記区画部材１６上に、他方の電池要素１５Ａを載置する。
　次いで、フィルム状外装材１３にエンボス加工で形成した上部電池要素収納部１４Ａで電池要素１５Ａを覆うとともに、上部電池要素収納部１４Ａの外周部を、下部電池要素収納部１４Ｂの外周部、区画部材１６の外周部とを重ね合わせて状態で、正極タブ１１Ａ、１１Ｂ、負極タブ１２Ａ、１２Ｂが存在する部分を含めて電解液注入部（図示せず）を残して熱融着によって封止する。
　次いで、電解液注入部から減圧含浸法等を利用して電解液を注入した後に、電解液注入部を封止して密閉する。
　電池要素１５Ａ、１５Ｂの間には電解液が非透過性である絶縁性の区画部材１６が配置されているので、両電池要素の間には電解液による液絡部が生じることがない。 If the manufacturing method of the battery of this invention is demonstrated in order, one battery element 15B will be mounted | worn with the lower battery element accommodating part 14B formed by embossing the film-form exterior material 13. FIG. Next, an insulating partition member 16 that is impermeable to electrolyte solution is disposed on the battery element 15 </ b> B, and the other battery element 15 </ b> A is placed on the partition member 16.
Next, the battery element 15A is covered with the upper battery element storage portion 14A formed by embossing on the film-shaped exterior member 13, and the outer periphery of the upper battery element storage portion 14A is replaced with the outer periphery of the lower battery element storage portion 14B, and the partition member. In a state where the outer peripheral portion of 16 is overlapped, sealing is performed by heat fusion, leaving an electrolyte injection portion (not shown) including a portion where the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B exist.
Next, after injecting the electrolytic solution from the electrolytic solution injecting portion using a reduced pressure impregnation method or the like, the electrolytic solution injecting portion is sealed and sealed.
Between the battery elements 15A and 15B, the insulating partition member 16 in which the electrolytic solution is impermeable is disposed, so that a liquid junction due to the electrolytic solution does not occur between the battery elements.
　充放電端子となる前記正極タブ１１Ａおよび前記負極タブ１２Ｂとは反対側の辺から取り出された正極タブ１１Ｂと負極タブ１２Ａとを相互に接合して導電接続部１７を形成する。
　正極タブ１１Ｂ、負極タブ１２Ａは、それぞれを取り出す辺の中央部であって、前記正極タブ１１Ｂを垂直方向に投影した部分に前記負極タブ１２Ａが位置するように配置しているので、上下に位置する正極タブ１１Ｂ、負極タブ１２Ａを導電接続部１７において相互の導電接続部を容易に形成することができる。導電接続部１７を絶縁性テープ等で被覆後に折り返すと電池の体積効率を高めることができる。 The positive electrode tab 11 </ b> B and the negative electrode tab 12 </ b> A taken out from the side opposite to the positive electrode tab 11 </ b> A and the negative electrode tab 12 </ b> B serving as charge / discharge terminals are joined together to form the conductive connection portion 17.
The positive electrode tab 11B and the negative electrode tab 12A are located at the top and bottom because the negative electrode tab 12A is positioned at the center of the side where the positive electrode tab 11B and the positive electrode tab 11B are projected in the vertical direction. It is possible to easily form mutual conductive connection portions of the positive electrode tab 11B and the negative electrode tab 12A in the conductive connection portion 17. The volumetric efficiency of the battery can be improved by folding the conductive connection portion 17 after covering with an insulating tape or the like.
　以上の様に作製した電池は、電池要素１５Ａ、電池要素１５Ｂを直列に接続しているので、正極タブ１１Ａと負極タブ１２Ａを充放電端子とすることで、一つの電池要素を備えた電池の２倍の電圧の２直列電池を得ることができる。得られた２直列電池の複数個を積層して相互のずれ防止の接着を行う場合には、個別の単位電池を積層する場合に比べて相互の接着個所を半分に減少させることができる。 Since the battery manufactured as described above has the battery element 15A and the battery element 15B connected in series, by using the positive electrode tab 11A and the negative electrode tab 12A as charge / discharge terminals, the battery having one battery element can be obtained. A double series battery having a double voltage can be obtained. When a plurality of the obtained two series batteries are stacked and adhered to prevent mutual displacement, the number of adhesion points can be reduced by half compared to the case where individual unit cells are stacked.
　図３は、本発明の他の実施態様を説明する図である。
　図３Ａは、平面図であり、図３Ｂは、図３ＡにおいてＢ－Ｂ’線で切断した断面図を示す。
　また、図４は、図３で示すフィルム外装電池の実施態様を説明する分解斜視図である。
　本発明のフィルム外装電池１０は、フィルム状外装材１３の内部の電池要素収納部１４Ａ、１４Ｂに電池要素１５Ｃ，１５Ｄを備えており、各電池要素１５Ｃ，１５Ｄを電気的に絶縁するとともに、各電池要素間で電解液によって液絡部が形成されて漏洩電流が生じることを防止する区画部材１６が配置されている。 FIG. 3 is a diagram for explaining another embodiment of the present invention.
3A is a plan view, and FIG. 3B is a cross-sectional view taken along line BB ′ in FIG. 3A.
FIG. 4 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
The film-clad battery 10 of the present invention includes battery elements 15C and 15D in the battery element storage portions 14A and 14B inside the film-shaped packaging material 13, and electrically insulates the battery elements 15C and 15D. A partition member 16 that prevents a leakage current from being generated due to a liquid junction formed between the battery elements by the electrolytic solution is disposed.
　図３，図４で示す電池では、電池要素１５Ｃ、１５Ｄは、同一の形状のもので、裏返して装着したものである。
　電池要素１５Ｃ、１５Ｄは、それぞれ同一の辺から平行に正極タブ１１Ｃと負極タブ１２Ｃ、正極タブ１１Ｄと負極タブ１２Ｄが取り出されている。また、正極タブ１１Ｃ、１１Ｄと負極タブ１２Ｃ、１２Ｄは、これらのタブを取り出した辺の中心をとおる線に対象な位置に取り付けられている。
　これによって、フィルム状外装材の下部電池要素収納部１４Ｄに収納した電池要素１５Ｄ上に区画部材１６を載置し、区画部材１６上に電池要素１５Ｃを載置されている。このように、正極タブ１１Ｄの上部には、負極タブ１２Ｃが位置し、負極タブ１２Ｄの上部には、正極タブ１１Ｃが位置するので、相互の接続を行い易くすることができる。また、正極タブ１１Ｃと負極タブ１２Ｄが近接しているので、両者が対向する部分には絶縁性テープ等を用いて両者が接触して短絡が生じることを防止することが好ましい。 In the batteries shown in FIGS. 3 and 4, the battery elements 15C and 15D have the same shape and are mounted upside down.
In the battery elements 15C and 15D, the positive electrode tab 11C and the negative electrode tab 12C, and the positive electrode tab 11D and the negative electrode tab 12D are taken out in parallel from the same side. Moreover, the positive electrode tabs 11C and 11D and the negative electrode tabs 12C and 12D are attached to target positions on a line passing through the center of the side from which these tabs are taken out.
Thus, the partition member 16 is placed on the battery element 15D housed in the lower battery element housing portion 14D of the film-shaped exterior material, and the battery element 15C is placed on the partition member 16. Thus, since the negative electrode tab 12C is located on the upper part of the positive electrode tab 11D and the positive electrode tab 11C is located on the upper part of the negative electrode tab 12D, mutual connection can be facilitated. Further, since the positive electrode tab 11C and the negative electrode tab 12D are close to each other, it is preferable to prevent a short circuit from occurring by using an insulating tape or the like in a portion where the two are opposed to each other.
　本発明の電池の製造は、以下の様に行うことができる。
　下部電池要素収納部１４Ｄに電池要素１５Ｄを装着し、電解液非透過性で絶縁性の区画部材１６を電池要素１５Ｄの上部に配置する。区画部材１６の上部に電池要素１５Ｃを配置して、電池要素１５Ｃを上部電池要素収納部１４Ｃによって上部から覆い、電池要素収納部の周辺部と区画部材１６とを重ね合わせた状態で、正極タブ１１Ｃ、１１Ｄ、負極タブ１２Ｃ、１２Ｄが存在する部分を含めて電池要素収納部１４の周囲を電解液注入部（図示せず）を残して熱融着して封止部を形成する。次いで、電解液注入部から減圧含浸法等を利用して電解液を注入した後に、電解液注入部を封止して密閉する。 The battery of the present invention can be manufactured as follows.
The battery element 15D is mounted in the lower battery element storage portion 14D, and the electrolyte solution-impermeable and insulating partition member 16 is disposed above the battery element 15D. The battery element 15C is disposed on the upper part of the partition member 16, the battery element 15C is covered from the upper part by the upper battery element storage part 14C, and the peripheral part of the battery element storage part and the partition member 16 are overlapped with each other. 11C and 11D, and the portion where the negative electrode tabs 12C and 12D exist are heat-sealed around the battery element storage portion 14 leaving an electrolyte injection portion (not shown) to form a sealing portion. Next, after injecting the electrolytic solution from the electrolytic solution injecting portion using a reduced pressure impregnation method or the like, the electrolytic solution injecting portion is sealed and sealed.
　次いで、充放電端子となる前記正極タブ１１Ｃ、前記負極タブ１２Ｄを残して、負極タブ１２Ｃと正極タブ１１Ｄとを、導電接続部１７において相互に接合することで二つの電池要素１５Ｃと１５Ｄとを直列に接続した電池が得られる。
　上部電池要素収納部１４Ｃと下部電池要素収納部１４Ｄに装着した電池要素１５Ｃ，１５Ｄの間に、絶縁性で電解液非透過性の区画部材１６を配置して電池要素１５Ｃと電池要素１５Ｄとの間で、液絡部の形成による漏洩電流を生じることがない。 Next, the negative electrode tab 12C and the positive electrode tab 11D are joined to each other at the conductive connection portion 17 while leaving the positive electrode tab 11C and the negative electrode tab 12D serving as charge / discharge terminals, thereby connecting the two battery elements 15C and 15D. A battery connected in series is obtained.
Between the battery elements 15C and 15D attached to the upper battery element storage portion 14C and the lower battery element storage portion 14D, an insulating and non-electrolyte partition member 16 is disposed to connect the battery element 15C and the battery element 15D. There is no leakage current due to the formation of the liquid junction.
　以上の様にして作製した電池は、正極タブ１１Ｃと負極タブ１２Ｄを充放電端子とすることで、電池要素１５Ｃと電池要素１５Ｄとの間で直列接続が形成されるので、一つの電池要素を備えた電池の２倍の電圧である２直列電池を作製することができる。
　また、作製した前記の２直列電池の複数個を積層して相互をずれ防止の接着を行う場合には、個別の単位電池を積層する場合に比べて相互の接着個所を半分に減少することができる。
　本発明によれば、２個の電池要素を隔てる区画部材は、２個の単位電池の外装体を兼ねることとなるため、一般的な単位電池を２個使用した２直列電池に比べて、絶縁層１枚分が不要であるので軽量にするとともに電池の容積を減少させることが可能である。
　また、２個の電池要素を一つのフィルム状外装材に収納したので、電池要素を個別にフィルム状外装材で被覆した場合のように単位電池のずれを防止するためにフィルム状外装材同士を固定する接着剤、粘着テープをが不要であるので、製造工程が簡単になると共に軽量化が可能となる。 Since the battery produced as described above has a positive electrode tab 11C and a negative electrode tab 12D as charge / discharge terminals, a series connection is formed between the battery element 15C and the battery element 15D. A two-series battery having a voltage twice that of the provided battery can be manufactured.
In addition, in the case where a plurality of the produced two series batteries are stacked and bonded to prevent mutual displacement, the number of bonding points can be reduced by half compared to the case where individual unit cells are stacked. it can.
According to the present invention, the partition member that separates the two battery elements also serves as an exterior body of the two unit batteries, and therefore, is more insulated than a two-series battery using two general unit batteries. Since one layer is unnecessary, it is possible to reduce the battery volume while reducing the weight.
In addition, since two battery elements are housed in one film-like exterior material, the film-like exterior materials are placed together in order to prevent the unit cells from shifting as in the case where the battery elements are individually covered with the film-like exterior material. Since an adhesive and an adhesive tape to be fixed are unnecessary, the manufacturing process is simplified and the weight can be reduced.
　以上の説明では、フィルム状外装材で形成した電池要素収納部に収納した電池要素を直列する例について述べたが、直列接続に限らず、並列接続をしても良い。並列接続をすることによって単一の電池要素を備えた電池と同一の電圧で、充放電容量が２倍の電池を提供することが可能となる。
　また、電池要素収納部には電池要素を２個収納する場合に限らず３個以上の電池要素を収納してそれぞれの電池要素の間に区画部材を配置して、各電池要素を直列、並列に接続した電池を提供することができる。 In the above description, the example in which the battery elements stored in the battery element storage portion formed of the film-shaped exterior material are connected in series has been described. However, the connection is not limited to serial connection, and may be connected in parallel. By connecting in parallel, it is possible to provide a battery having the same voltage as that of a battery having a single battery element and a charge / discharge capacity of twice.
In addition, the battery element storage unit is not limited to storing two battery elements, and stores three or more battery elements, and a partition member is disposed between the battery elements, and the battery elements are connected in series and in parallel. A battery connected to can be provided.
　本発明のフィルム外装電池、およびそれを用いた組電池は、従来のフィルム外装電池よりも軽量で、少ない工程で効率的に提供できることから、電動自転車、電気自動車、電力貯蔵等の高電圧、高エネルギーを必要とする電源として有用である。 The film-clad battery of the present invention and the assembled battery using the same are lighter than conventional film-clad batteries and can be efficiently provided with fewer processes. It is useful as a power source that requires energy.
　１０・・・単位電池、１３・・・フィルム状外装材、１１，１１Ａ、１１Ｂ，１１Ｃ，１１Ｄ・・・正極タブ、１２，１２Ａ、１２Ｂ，１２Ｃ、１２Ｄ・・・負極タブ，１４・・・電池要素収納部、１４Ａ、１４Ｃ・・・上部電池要素収納部，１４Ｂ，１４Ｄ・・・下部電池要素収納部、１５０・・・正極集電体、１５１・・・正極活物質層、１５２・・・正極電極、１５４・・・負極集電体、１５５・・・負極活物質層、１５６・・・負極電極、１５７・・・セパレータ、１５Ａ、１５Ｂ，１５Ｃ，１５Ｄ・・・電池要素 、１６・・・区画部材、１７・・・導電接続部、１８・・・シール材、２０・・・固着部、２１・・・接合片 DESCRIPTION OF SYMBOLS 10 ... Unit battery, 13 ... Film-like exterior material, 11, 11A, 11B, 11C, 11D ... Positive electrode tab, 12, 12A, 12B, 12C, 12D ... Negative electrode tab, 14 ... Battery element storage part, 14A, 14C ... Upper battery element storage part, 14B, 14D ... Lower battery element storage part, 150 ... Positive electrode current collector, 151 ... Positive electrode active material layer, 152 ... -Positive electrode, 154 ... Negative electrode current collector, 155 ... Negative electrode active material layer, 156 ... Negative electrode, 157 ... Separator, 15A, 15B, 15C, 15D ... Battery element, 16, ..Division member, 17 ... conductive connection portion, 18 ... sealing material, 20 ... fixed portion, 21 ... joint piece

Claims (4)

  1. 　正極タブと負極タブが引き出された複数の電池要素と、
    　前記複数の電池要素を収納する電池要素収納部を有するフィルム状外装材と、
    　電解液を透過させない非透過性と電気絶縁性を備える区画部材からなるフィルム外装電池であって、
    　前記電池要素から引き出された正極タブ、負極タブ、および前記区画部材の外周部は、フィルム状外装材との封口部において一体に封口されたものであって、前記封口部から取り出された正極タブ、負極タブを、直列または並列に接続したことを特徴とするフィルム外装電池。     A plurality of battery elements from which a positive electrode tab and a negative electrode tab are drawn, and
    A film-shaped exterior material having a battery element storage portion for storing the plurality of battery elements;
    A film-covered battery comprising a partition member having non-permeability and electrical insulation that does not allow electrolyte to permeate,
    The positive electrode tab drawn out from the battery element, the negative electrode tab, and the outer peripheral portion of the partition member are integrally sealed at the sealing portion with the film-shaped exterior material, and the positive electrode tab taken out from the sealing portion A film-clad battery, wherein negative electrode tabs are connected in series or in parallel.
  2. 　前記区画部材がフィルム状外装材であることを特徴とする請求項１記載のフィルム外装電池。 2. The film-clad battery according to claim 1, wherein the partition member is a film-shaped packaging material.
  3. 　前記区画部材が金属板の表面をポリプロピレンまたはポリフェニレンスルフィドで被覆したものであることを特徴とする請求項１または２記載のフィルム外装電池。 3. The film-clad battery according to claim 1 or 2, wherein the partition member is a metal plate whose surface is coated with polypropylene or polyphenylene sulfide.
  4. 　請求項１から３のいずれかに記載のフィルム外装電池を複数個同士、あるいは前記フィルム外装電池と単一の電池要素を収納した電池とを、並列、直列の少なくともいずれか一方の電気的接続を形成して接続したことを特徴とする組電池。 A plurality of film-clad batteries according to any one of claims 1 to 3, or a plurality of film-clad batteries and a battery containing a single battery element are connected in parallel or in series. An assembled battery characterized by being formed and connected.
PCT/JP2012/073508 2011-09-21 2012-09-13 Film sheath battery and assembled battery WO2013042612A1 (en)

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